Looking for help

I've got 6 beauties on the go, 5 weeks in and switched to flower this week.
I've fed and measured run off and it's sky high!!
I'm using H&G bat special soil
So, the EC reader has tap water at 5 .. And my massively diluted feeding water at 8/9 .. Exactly what I was told
...
But the run off was 40-50!!
So confused, anyone help ? No clue why it's so high, I've only had one light feed a few weeks back

Hey man its maybe because all soil organic or not comes with a shit ton of nutes and alot of the time people don't know this they just think it's a good soil to use. And you get things going and they look at the feeding charts of there nute line they plan on using and begin feeding not knowing you are compounding the problem if you want to fix this fast depending on the size of you pots flush them with 6-10 times that size to gallons of water ph that water at 7.0 after that let them girls DRY OUT salts will leach is this process giving you a hell of a LOWER number I hope this helps man good luck

Thx - any other help would be good, I'm freakin out. They look good and healthy tho, thus I'm confused